Car-ventilating system.



D. I. UOOKE.

CAR VENTILATING SYSTEM.

APPLIGATIGN FILED JULY 16,1912.

L5L312 Patented Jan.21,1913

UH UH 4 K 71429? 655 L ML/ j? var/for;

ordinarily would result in the7-case of intakes which are farthestremoved from the fan is compensatedfor by the increased capacity of suchintakes. 1

The simplest manner in which the speed of the air entering each of theintakes may be predetermined is by providing openings of diflerent areasat such points, these areas being graduated increasingly as they arepositioned farther away from the point of exhaust. It is also possibleto provide intakes designed to admit but a certain predeterminedquantity' of air in other ways than by graduating the area of theopenings throughwhich the air enters, but the method outlined is. theone which I prefer to adopt. It should be borne in mind that in a car ofthe vestibule type, such as is particularly adapted for the installationof this system of ventilation, that the flow of air through thepassenger com artment, due to the motion of the car itsel is practicallynegligible. It, therefore, follows that the point of exhaust may belocated in any convenient portion of the car, and towork with equalefiiciency regardless of the direction of movement of the car.

The ventilating system which I have described is such as to admit into acar at every point fresh air in adequate and uniform quantities, and toexhaust the same therefrom without the provision of any duct speciallyarranged and constructed for the purpose of drawing ofi' vitiated air.

I claim:

In a car ventilating system, the combination with a car body ofmechanically operated means for exhausting vitia-ted air therefrom, saidexhaust means operating to remove vitiated air through a single exhaustport communicating directly with the main car body, and a pluralityof-fresh air intakes adjacent to the car floor, having inlet capacitiesgraduated increasingly in size according to their distance from thepoint of exhaust.

DWIGHT I. COOKIE. Witnesses:

EPHRAIM BANNING, THOMAS A. BANNING;

